AQA GCSE Physics (9-1): Electrical Power and Energy.

1)a) Using P=IV, take the current and multiply by the potential difference.
2A x 6V = 12W
b) Using the V=IR formula from previous videos, take the potential difference and divide by current for resistance.
6V/2A = 3ohms.
c) i) Using E=QV, take charge and multiply by voltage.
50C x 6V = 300J
ii) Using the I=Q/t equation, re arrange for t, you get t=Q/I.
50C/2A = 25seconds.